A guitar signed by Prince from his Dec. 17, 1997, "Jam of the Year" tour is up for auction. The signature included his symbol when he was the artist formerly known as Prince.(Photo: Mike De Sisti / Milwaukee Journ, Milwaukee Journal Sentinel)Buy Photo

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Some of the guitars signed by artists who performed at the Bradley Center over the years, including the Dave Matthews Band, will be up for auction. As part of the BMO Harris Bradley Center leaders finalizing plans for closing, they are planning to auction off everything from sports and concert memorabilia to fixtures and seating. Mike De Sisti / Milwaukee Journal Sentinel

BMO Harris Bradley Center President Steve Costello laughs as he holds an electric guitar signed by the band members of Metallica when they performed there in 1997. The guitar is up for auction. Mike De Sisti / Milwaukee Journal Sentinel

A guitar signed by Prince from his Dec. 17, 1997, “Jam of the Year” tour will be among the items up for auction during the BMO Harris Bradley Center's online sale of memorabilia. The signature included his symbol when he was the Artist Formerly Known as Prince. Mike De Sisti / Milwaukee Journal Sentinel

A guitar signed by Prince from his Dec. 17, 1997 “Jam of the Year” tour will be up for auction. The signature included his symbol when he was the Artist Formerly Known as Prince. Mike De Sisti / Milwaukee Journal Sentinel

BMO Harris Bradley Center President Steve Costello steadies one of the original Bradley Center letters that adorned the building when it opened 30 years ago. All the letters are still intact and will be auctioned off as part of the arena's auction. Mike De Sisti / Milwaukee Journal Sentinel